Answer:
x=5
Step-by-step explanation:
∠D=∠E (angles opposite to equal sides are equal)
So, =3x+10
10=-3x
10=x(x-3)
we know 5×2= 10 & 5-3=2,
So, 10=5×(5-3)
10=5×2
∴x=5
Yes that is extremely accurate
I believe it's one of the four in photo.
You would do 4-2= 2 then 8/2 =4 .. final answer being 4